Amsoil synthetic 5w20 ,motorcraft filter. '05 Lariat,only 39,000 miles. Hoping for many quiet miles.

 

So just your truck? What mileage were you at when you started the 5W30?

 

Motorcraft 5w30 synthetic blend, nothing but a motorcraft filter....i know its not needed but get a gut twisting feeling if i run it longer that 3-4 thousand.

 

Amsoil 5w30 with Lucas Oil Synthetic Stabilizer. I go no more than 10k miles on this 25k mile guaranteed oil depending on how I drive (lots of highway or lots of city). Don't wait on the timing system fix! I waited too long to have it done and internal engine parts failed a year after I had it done because of the broken tentioners. Putting a remanned in it as we speak. I'll probably go down to 5w20 with the new engine until I put some miles on it.

 

That's an awfully bold statement, and honestly you have no proof of that. Many people run 5w-20 with zero issues. Explain to me how it results in premature wear?

 

Wasting your money. Switch to semi-synthetic, and continue changing every 5,000 miles.

 

Total bunk.

5W20 has been the accepted oil to use in the later engines for fuel economy, and to help raise CAFE fleet mileage requirements on automotive manufacturers. Using 5w20 will not harm your engine.

Folks need to stop spreading these foolish myths about engine oil.

I have a 2000 Ford ranger with the 3.0 V6; It has used 5w-20, and currently has 234K on its engine; no rebuild, and continues to run just fine. My current 2007 F150 4.6 has 103K, and its beed running on 5w-20 as well. No issues.

I'd love to see and read a statement by Ford that says "pre-mature valve train wear" and "top end wear" will occur if you use 5w-20.

 

It's going to be a little harder than that, to teach this old dog new tricks.
I tow pretty often, run it 80mph up north at least once a month, and sit at idle probably more than I should. Also, the winters are cold as a bitch here, -11° as we speak.
It always feels better to me having clean oil in there, and I'm sure my engine appreciates it also. I may be wrong, but I'm pretty sure it says to change it at 5k in the manual doesn't it?

 

If anyone has any doubts about the ability of Motorcraft 5W20 semi-syn to perform well in these engines, register over at bobistheoilguy.com and use the search tool. Grab a six-pack, a good comfy chair, and immerse yourself in the volumes of 'which oil is better' and 'how good is Motorcraft 5w20' threads. Is it the perfect oil for every situation? Beats me. But Motorcraft oil, plus a Motorcraft filter, changed regularly, will do the trick. As I said in another oil thread, I'm still waiting to see the 5.4 that failed prematurely because it was run on 5w20. Where is the study that proves that?

 

Lol!
Obama has been "accepted" as our president, but how has that been working out for everybody?.... The short answer is NOT WELL, at least to anybody that works for living..


While I won't deny Doug loaded up his statement, I'm also a very happy 5w-30 user, just like him.. My tick free, now supercharged 3v has been running 5w-30 for over 75k miles and I haven't heard a diesel sound since I made the switch.. I've been supercharged now for around 24k miles and the motor seems to be loving it... I'm also an Amsoil signature 5w-30 user, and I run it to 6-8k intervals, 10k if necessary. I'm using zero oil that doesn't get recovered in my catch can, so my usage is about 4 oz of oil ever 2k miles that is all caught purging threw my PCV system, not blowing by my rings or valves.. I'm almost at 182k miles on this motor, and I start it in occasional sub zero temps that make even the power steering pump squeal.. Yet still no rapping from my motor...

Before I switched over I was running 5w-20 semi syn and had a annoying amount of phaser rattle/ticking.. From the moment I switched the motor quieted down, then after i updated the VCT solenoids it got even more quieter. Milage seemed to stay consistent..

The phasers are a bad design, I don't know anybody that would be willing to refute that. They are metal on metal, they have a limited lifespan, and they require a very strong oil film to wear "optimally".. Once wear hits the phaser to a certain point, most people find a lot of stalling, poor idle, and poor milage as symptoms.. These symptoms are all usually cured by a switch to 5w-30. If they are not, then new phasers and a subsequent timing overhaul are necessary... Switching to 5w-30 can sometimes be a great gauge to see just what is going wrong or right with your motor..

Now I don't give 2 ****s what some consensus is on bob is the oil guy. The argument still rages on to this day, at which point people gang up and stifle the conversation with data that doesn't fit the bill for every region, or the usage history of the 3v.. Now listen, 5w-20 is a good oil, just not good ENOUGH for the 5.4 3v IMHO.. The new TIVCT system can happily use 5w-20.. But the old VCT system does not do so well in every single case.. So if anybody does anything about this 5w-30 vs 5w-20 debate, why don't we stop using blanket statements about the oil itself, and start talking about what specific motor it is going in.. As far as the 3v goes, mine will never see 5w-20 ever again...

As some of you know I've got a large thread that examines this very topic here on the forum. If your looking for proof of real life accounts that 5w-30 is a great choice of oil for the 5.4 3v you can take a look at it..

Data is information, and it's also something people confuse with proof.. Proof is in the execution, not the conjecture of how something will occur, or might occur based on values.... I see a lot of data these days that gets spewed around as proof, and people hinging arguments off of it. But there is something people forget that lies beyond the numbers and figures. It's called reality..

If your waiting for some isolated study loaded with data to surface that proves that 5w-20 is the best choice for the 3v... Good luck. Most people have no time/resources to do this, and considering the motor is no longer produced it would make any findings a misallocation of today's current resources.. The time for that has come and gone, and luckily for Ford most of their consumers were parroting their talking points right through the 3v's lifespan..

Now to anybody who wants to argue my statement, go buy a stock on our 18k+ Dow jones... Just don't tell me you got it cheap, and don't tell me you bought it a decent price based on fundamentals.. Because you likely did not..
Show me how the data led you to your decision, and then show me your expected outcome... Then once reality hits, tell me if that data was any good or not..